Arthur cuthbert



(No Model.) A. -CUTHBERT.

BLBGTRIGAL WIRE STRIPPER. No. 470,318; Patented Mar. 8, 1892.

UNITED STATES ARTHUR CUTHBERT, OF

* PATENT OFFICE.

MAIDENHEAD, ENGLAND.

ELECTRlCAL-WlRE STRIIPPER.

SPECIFICATION forming part of Letters Patent No. 470,318, dated MarchB, 18 92.

. Application filed )ctober 6,1891

To all whom it may concern/.-

Be it known that I, ARTHUR CU'rH EE'r, a subject of the Queen of Great Britain, residing at Maidenhead, in the county of Berks, England, have invented a certain new and Improved Electrical-Wire Stripper, of which the following is a specification.

This invention consists in a hand-tool for slitting the insulating covering of electrical wires and dressing the wire for forming connections, &c. I

The improvement consists in the shape and form of the two cutting-blades, which are intended to sever the insulation around the wire, and in the form of cutter and wire-guide for slitting the insulation longitudinally, so that the part severed may be removed from the wire.

In the drawings, Figure l is a view of such hand-tool open for use. Fig. 2 is aside view thereof. Fig. 3 is an end view of the one end of the tool closed. Fig. 4 is an end view of the other end of the tool closed.

A A are the two malleable-iron handles, to which the steel blades B B are fastened by screws. 4

O is the pivotal screw or. bolt and nut; D, the spring tending to open the tool; E, the connector for keeping't-he tool closed when not in use.

According to this invention the blades B B are made with the two dull points I) b b b' at the extremities of their cuttingedges, these points being sharpened along their inner edges, but not along their outer edges. Between the points I) I) and b b are sharpened edgesc c, which may be straight or curved. The insulating-cover around the Wire is cut on the side of the wire nearest the operator by the outer points of the tool and on the side farthest from the operator by the inner points ofthe tool. The wire itself lies to the outside of the outer points or to the inside of the inner points, and is therefore uninjured by complete closure of the tool.

. Serial No. 40 '7,954-. (No model.)

Having severed the length of insulatingcover to be removed from the remainder, as described, or before doing so, this length is slit from end to end from the periphery to the surface of the wire by drawing the wire "between the slot or recess 61 in one of. the handles A and the knife eon-the other. rocks in a socket in the rotary pin e and its that may not be quite straight. A V-guard e on the end of the knife gives the wire a central guiding toward the knife, the same effect being arrived at by shaping the recess d, as shown. The lugs e limit lateral play of the knife 6. The knife is prefcrablymade with rounded saw-like teeth sharp all round. This form of slitter needs no adjustment, be ing automatically suited to centrally slit wi re of any size from theoutsidecover to the core with one cut. 7

I claim as my invention-- 1. A tool for severing the covering of covered wire, having the pair of cutting-blades B B, with projections 19 1) 5'1) with dull points sharpened on the inside, and cutting-edges c 0 between said projections, as set forth.

2. A tool for slitting the covering of covered wire withone slit lengthwise of said wire, having a slot d on one arm and a knife e on the other arm movable in the central axis of said slot d and adapted to slit a covered wire drawn through said slot d. j

3. A tool for slitting the covering of covered wire, having a wire-receiving slot d and a rocking and rotative knife 6, with guide e thereon, adapted to slit centrally a covered wire drawn through said slot cl.

In witness whereof I have signed this specification in presence of two witnesses.

ARTHUR OUTHBERT.

Theknife lateral movement allows for working on wire 

